Home / 137,870.35-206,805.53-90,631.15

Finding the Fourth Proportional to 137,870.35, 206,805.53 and 90,631.15

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Solution

The fourth proportional to 137,870.35, 206,805.53 and 90,631.15 is: 135,946.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,870.35 : 206,805.53 = 90,631.15 : x
  2. Step 2: Convert to fraction form
    137,870.35/206,805.53 = 90,631.15/x
  3. Step 3: Cross multiply
    137,870.35x = 206,805.53 × 90,631.15
  4. Step 4: Simplify right side
    137,870.35x = 18,743,022,557.10
  5. Step 5: Solve for x
    x = 18,743,022,557.10/137,870.35
  6. Step 6: Final answer
    x = 135,946.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.